Quick-removable breech-block for hydraulic cylinders



C. T. ERICSSON.

QUICK REMOVABLE BREECH BLOCK FOR HYDRAULIC CYLINDERS.

I APPLICATION FILED IULY I7, I919. v

Patented Feb. 22, 1921.

SHEETSSHEET I- Elmmzwtoz Charles Zfii ssvw wi/Imeoo C. T. ERICSSON. I

QUICK. REMOVABL BREECH BLOCK FOR HYDRAULIC CYLINDERS.

APPLICATiGN FILED JULY'H, I919.

Patented 22,1921 I 2 S EE -.SHET 2- nozmtoz Charles T. E rcasbn UNITEDSTAT-ES PATENT-OFFICE. 1

CHARLES T. ERICSSON, OF BIRMINGHAM, ALABAMA, ASSIGNOR TO BIRMINGHAMMACHINE & FOUNDRY COMPANY, A CORPORATION OF ALABAMA. F i

. QUIox-nEMovABLE Brannon-Brook FOR HYDRAULIC CYLINDERS} Applicationfiled ul 17, 1919.1 Serial no. 11,631.

To all w ham it may 00mm Be it known that I, CHARLES T. ERICSSON, acitizen of the United States of America, residing at Birmingham, in thecounty of Jefferson and State of Alabama,have invented certain new anduseful Improvements in Quick-Removable Breech-Blocks for HydraulicCylinders, of which the following is a specification.

My invention relates to a quick removable I breech block or plug forhydraulic cylinders and particularly for the hydraulic cylinders ofsugar mills.

It is very essential that the repacking and replacing of the hydraulicson sugarmills at the plantation during the grinding season should bedone as quickly as possible, and with this end in view I have designed anew hydraulic breech block which requires no disconnection of hydraulicpiping or any other parts and no unscrewing of bolts except one smalllock bolt, in order to lift out the hydraulic breech block andpiston ofthe cap. 7

The particular object of my construction is to obtain the greateststrength of attachment for the block with the least timerequired toremove and replace it and I attain this by the provision of a breechblock having teeth on, its opposite sides which can with a quarter turnbe brought into engagement with similar teeth in the top'cap of thecylinder.

A further object of my invention is to provide the breech block with apair of lugs which co-act with a fixed pin to arrest the block inengaged or disengaged position, a removable stop pin being also providedto enact with the other in engaging said lugs so as to positively holdthe breech block against rotation in the top cap. I

My invention also comprises the novel details of construction andarrangement of parts, which in their preferred embodiment only are shownin the accompanying drawings which form a part of this specification,

and in which Figure 1 is a partial end elevation of a sugar mill withthe hydraulic cylinder in its top cap shown in vertical section and itsbreech block shown in partial section in operating position.

Fig. 2 is a plan view of the top cap with Specification of LettersPatent. Patented Feb 22 1921 shown in section.

Fig. 3 is a detail plan view of the breech block showing both stop pinsin operating position.

F igft is a vertical section through the top cap with the breech blockshifted into re leased position ready to be lifted out.

Similar reference numerals refer to similar parts throughout thedrawings.

As illustrated, 1 is typical of any sugar mill which is provided with aram 2 working in a hydraulic cylinder 3 in its top cap 4.

The water inlet 5 is taken through the side of the cap and tapped intothe heavy brass 8 has corresponding teeth 9 cut to gage so as toaccurately match teeth in the cap.

hen working the breech block is in posi tion with all of its teeth 9,engaged with teeth 7 in the cap andis so held by a pin 10 anda tap bolt11 which match in the oppositely facing hook lugs 12 spaced 90 apart onthe top of the breech block and disposed to overlap the top cap. The pinis made fast in the top 90 removed from the threaded hole tapped in thecap for the bolt 11.

Now in order to lift out the breech block all it requires is to unscrewthe bolt 11 and turn the breech block around 90 by means of a wrenchfitted over the square 13 on top of the breech block, until the slot inthe breech block comes to positive stop against the breech blockremov'edand the "bol s pin 10, when the breech block can be lifted out.

To replace the block, it is lowered back into the cylinder with itsteeth 9 just clearing the cap teeth? and is given a 90 turn which againengages the teeth, after which the bolt 11 is screwed back in place andthe lugs 12 are held by the bolt 11 on one side and the pin 10 on theother. The idea of having a plurality of circular teeth? and 9 is to"distribute the pressure on as large a surface as possible. i Thisinvention is not intended to be restricted in scope to the specificembodiments shown, but contemplates such modifications as come withinthe spirit and scope of the claim.

What I claim as new and desire to secure by Letters Patent, is

A sugar mill cap comprising a hydraulic cylinder with opposite sets ofteeth subtending an arc of approximately 90, a breechblock withcomplementary teeth adapted to be engaged with the cap teeth by aquarter turn of the block, a water inlet entering the cylinder below theblock, a top flange on the block adapted to rest on the top of the cap,

is shifted from released to engaged position and vice VGlSil, and aremovable pin adapted to cooperate with the fixed pin in engaging I thetwo shoulders simultaneously to lock the breech block in its engagedposition.

In testimony whereof I afhx In signature. n CHARLES T. ER CSSON.WVitne'ss:

NOMIE WELSH.

